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Holger Hans Peter Freyther holger at freyther.deOn Fri, May 23, 2014 at 11:44:40AM +0200, Michal Grznár wrote: Hi, > Hi, I am sorry for my previous bad post format. There are the right diff > files. > And the problem was as I said in Imsi attach procedure new TLLI == new > allocated P-tmsi, and there was a problem that the function gprs_tmsi2tlli() > function there was not called and so I had to mask the upper bits in > function where the p-tmsi is allocated, there is also a pcap trace where > you can see it. sorry for the late reply. The issue is that your MS does not convert the P-TMSI to a Local-TLLI. On the other hand Jacob has pointed me to some documentation of a measurement equipment manufacturer that states that the local bits/highest two bits of the ptmsi should be set. > > > restart: > > > +++ ptmsi = rand() | 0xc0000000; /*because of GPRS IMSI we will carry a patch like this.